html,
body,
h1,
h2,
h3,
h4,
h5,
h6,
div,
dl,
dt,
dd,
ul,
ol,
li,
p,
blockquote,
pre,
hr,
figure,
table,
caption,
th,
td,
form,
fieldset,
legend,
input,
button,
textarea,
menu {
    margin: 0;
    padding: 0;
}

button {
    width: 100px;
    height: 40px;
    line-height: 40px;
    border-radius: 5px;
    text-align: center;
    border: 1px solid #DCDFE6;
    background-color: #fff;
    color: #606266;
    &:hover{
        color: blueviolet;
        background-color: chartreuse;
    }
}